Safety in an EM Lab. Chemicals Common chemicals Handling Disposal, waste management Cleaning and exposure Equipment Radiation Electrical safety Servicing Physical and Mechanical Hazards. Read Chapter 21 in Bozzola text!. Primary Hazard Color Code
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
Disposal, waste management
Cleaning and exposure
Physical and Mechanical Hazards
Read Chapter 21 in Bozzola text!
Contact Hazards White
Many labs color code bottles to aid in segregated chemical storage. The assignments given above are standard for most labs and are based upon chemical manufacturer’s color code designations. Liquids should also be stored away from solids.
Aldehydes (glutaraldehyde, paraformaldehyde)
Carcinogenic, allergies, sensitivity
Minimize exposure to fumes
Readily absorbed through skin (garlic taste)
Osmium tetroxide (osmic acid)
Toxic, irritant, volitile
Spills reduced to metallic osmium with corn oil or
Na Ascorbate powder, then cat litter to pick up.
Used as solvents, dehydrants and cleaners
Flammable- keep in flammables cabinet
Chemicals dissolved in them can penetrate skin
Dried salts explosive
Allergic reactions when using antihistamines
Heavy metal salts (lead and uranium)
Basic chemical makeup
Hazards and treatment
Handling and clean up
University Env. Safety
Closed toe shoes
Work deep in ventilation hood
New spatula for each chemical
Have clean-up equipment available
All spills are hazardous waste
Clean after yourself !
Spent, expired, or surplus chemicals
Use less toxic alternatives if available.
Use a minimal amount - avoid large amounts.
Keep Waste in separate containers - avoid mixing
Some can be recycled.
Easier to keep track of amounts for manifests.
Some chemicals are not compatible.
Clean up after yourself!
Always clean up any spills, messes.
Make a spill kit
Mercury difficult to clean up
Can’t wipe or pick up
Use a vacuum with trap, not vacuum cleaner
(volatilizes the mercury)
Treat the Cleaning materials as hazardous waste
-Not into trash can or down sink
An inexpensive spill kit can be made with kitty litter and other items such as gloves, safety glasses, a broom, and a dust pan. Kitty litter is an excellent all purpose absorbent and should be kept in labs where high volumes of solvents are stored.
Vacuum evaporators and sputter coaters
Evaporated metals easily taken up
Hot components (burns)
Implosion of bell jar
High pressures in bomb
Liquid CO2 - freeze damage
Fumes - ethanol or CO2
Oil filters to minimize inhaling
Liquid N2 and compressed gasses
Explosion of tank
SF6 gas – changes to toxic Fluorine if heated above 200 C
Mercury bulbs can explode if old and overheated (usually after 200-300 hours of use).
Symptoms of mercury poisoning include tremors, tunnel vision, loss of balance, slurred speech, and unpredictable emotions.